Machine for operating upon blanks of sheet material



Sept. 7 1926. 1,598,614

T. LUND mcnma FOR OPERATING UPON BLANKS OF SHEET ummn.

' Filed May 14. 1920 :s Sheqt-Sheet 1 Sept. 7 1926.

T. LUND MACHINE FOR OPERATING UPON BLANKS 0F SHEET MATERIAL 3Sheets-Sheet 2 Filed May 14. 1920 NAM .fiN

'T. LUND MACHINE FOR OPERATING UPON BLANKS OF SHEET MATERIAL Filed May14. 1920 s sheets-sheet Sept. 7 1926. 1,598,614

Patented Sept. 7, 1926.-

UNH an; s re-ft its Tl-I,OMAS.LU1\TD,OE BEVERLY, MASSAQII'USE iseasn ii-"rs, Aserenon rro UNI ED snon Melan n:

nnyoonnonearoiton teauifnnsoEnnw ant -ens, Aconronnnron onivnw JERSEY,

MAGHINE-EQB. O3ERATING ron eams-e neer, MATERIAL- Application filed m14, 19,20; Seria1.1\To.'381,4 70.

pose of rendering them more efiicient and reliable in operation. To theaccomplishnient'of this objectandsuch others as may hereinafterappear,as will be readily understood by,those skilled in the art, the pliesentinvention comprises the featnresgand combinations offparts hereinafterdescribed pended claims.

Thevarious features of the invention w ll and particularly pointed outin the ap:

be hestunderstood from, a description of ll ig'. 8 is a View, partly inverticahsection and partly in side elevation, of the machine; Fig. lis adetail sectional view takenon the line 4 4: of Fig. 3; Fig. .5 is adetail view, in front elevation and on an enlarged scale, showing meansfor insuring the. feeding of a sing'le lift only ata time from thesupply magazineof the machine; and Fig. 61 is a section on the line 6-6of Fig.

The machine in its general organization is similar-to t Hit shown in aco-pending application, Serial No. MQAM, filed January 15, 1917, by thepresent applicant, now Patent No. 1,381,318. Briefly stated, the presentmachine comprises, in common with the machine of said patent, askivi11g'1nechanism; a feeding mechanism for antol nath cally advancingthe lifts from a? supply magazine to the slriving mechanism; means forinsuring the feeding of a single lift only at atime from the supplymagazine; a support across which the skived ifts are pushed, in seriesby the advance 0 the lifts from the skiving mechanism until they dropone by one -from the end of'the support into a receiving};magazine; alift-straighteni a or fi wing; device whichprevents culii of s as theythe dimensions.

n'isin; and means, operating uponthe skived lifts as they enterthereceiving magazine, for, stacking them' therein. In the presentmachine, however, certain improvements are embodied in the automaticfeeding mechanism and an improved stacking device is employed whichoperates in amore efficient and reliable mannerto staclethe lifts inthe" In addition, the pres- 7 receiving magazine. ent machine isprovidedwith a stabilizing device for facilitating the delivery ofthelifts in succession from the support which extends between theskivingmeclianism and the receiving magazine; A device f for tippingthelifts slightly, asthey start to drop into the receiving magazine may beemployed to insure thatthey will come to rest therein in the, properposition for the performance of the-stackingoperation; and'va- 'r'iousadjusting'ineans are incorporated which are. arranged to enable, the'machine to operate. up on l fts varying Referring to the drawings, thevarious p arts and operating instrumentalities or the machine aremounted upon a frame comprising a substantially rectangular body portion10. havinglegs 12 2) which are adapted to rest upona bench or othersuitable support. The. body portion of the f'am'e is" provided withstandards lea rising from its opposite ends. A. main power shaft 16(Figs. 2 andBI) extends horizontally at the rear of the machine and isjournaled in hearings formedin a pair of arms 18which projest.rearwardlyfromthe body port on 10 of the frame. The power shatt 16 is providedwith the usualffa st and loosepnlleys 20 and 22, whichare adaptedtoreceive a belt leadingjfrom ja snitable source of power.

The skiving] mechanism shown is of the pjen'eraljtype commonly used inthe manufacture of shoes to skive, split or, even, blanks of leather andcomprises upper and lower fee d rolls 26" 3) and 28 respectively, andaskivinf; knife 30, which is hOlTis2 ntally, monntedwith its cuttingedge projecting between saidrollsg The periphery of] the lower. feedroll 28 is serrated or roughened to facilitate thefeeding of the blanks,The illustrat iachine is desi ned for operating,upon i iifts for-heel vd widely in skiving knife is interposed between the trunnions of theupper feed roll 26 are jour-.

naled in bearing-blocks 36 (Fig. 2)- which are vertically adjustable inways in the frame standards 14 by means of inclined cam faces that areformed on a slide-bar 38 and normally serve to maintainthe bearingblocksin adjusted positions. The slide-bar 38 is actuated to adjust thebearing-blocks 36 in unison by means of a hand-wheel 40 that is fast ona shaft having a rack and pinion connection with the slide-bar. The

fiat upper surface of the body 10 of the frame and an inclined plate 42which temporarily supports the skived lifts, the knife being rigidlysecured in position by means of bolts 44 which extend through said liftsupporting plateand through the knife.

The feed ro'lls 26 and 28 are driven from the power shaft 16 so that.their adjacent surfaces move in the same direction and at the same rateof speech To this end one of the trunnions of the lower feed roll hassecured thereto, a large gear 46 which meshes with a small gear 48,that. is fast on the power shaft. A second small gear 50 (Fig.

3) which is secured to the power shaft 16 at the opposite side of themachine, meshes with a small'idler gear 52 which, in turn, meshes with alarge gear 54 that is fast to one of the trunnions of the upper feedroll.

The lifts to be operated upon are stacked in a vertical column within askeleton magazine which is located at the front of the 'machine. Themagazine 60 comprises a pair of upright wall members 62 and 64 (Figs. 2and which are mounted upon armagazine support 66, the latter extendingacross the upper part of the machine and being bolted to the framestandards 14. The upright magazine member 62 consists of a flat platewhich is rigidly secured to the magazine support 66, the plate having asmooth, vertical front face for engaging and alining the breast edges ofthe stacked lifts. The upright magazinemember 64 comprises a strip ofsheet material which is bent to cause its rear face to conform somewhatto the contour of the curved rear edges of the lifts containedwithin'the magazine. The member 64 is adjustably supported by a pair ofhorizontal bars 68 (Figs. 2 and which are arranged one above. the otherand adapted to slide in guideways formed in the magazine support 66.'The supporting" bars 68 are severally provided with racks 7 O which areoperatively engaged by a pair of pinions 72 carried by a vertical shaft74 that is journaled at its ends in bearings on the magazine support 66.Secured to the shaft 74, between the pinions 72, is a handwheel 76, bymeans of which the pinions may be turned to adjust the magazine member64 toward'or from the magazine member 62 and thus enable the magazine toac commodate lifts of different sizes; The lowermost lift of the stackwithin the magazine rests upon a horizontal table which is provided, atits opposite lateral edges, with down-turned webs 82 (Fig. 1) that arese-' cured to the frame of the machine. The magazine member 62 isarranged with its bottom edge spaced above the table sufficiently topermit the thickest lifts which may be operated upon to be fed from thebottom of the stack. the magazine member 64 is located far enough abovethe table to permit the reciprocation beneath it of a feed-slide orpusher 84, by means of which the lifts are fed oneby-one to the skivingknife. from the bottom of the stack in the magazine.

The construction of the feed-slide or pusher 84 is identical with thatof the corresponding p'art shown in the patent hereinbefore mentioned,except that the forward end of the feed-slideis shaped, as shown in Fig.1, to engage the rear or curved edges of the lifts at points on oppositesides of a medial line normal to the breast edge thereof. Thisparticular construction tends to prevent the lift from tilting in alateral edgewise direction as it is being fed by the pusher and tends toinsure that the breast edge of the lift will be presented squarely tothe grip of the feed rolls.

The feed-slide 84 is. rcciprocated horizontally in suitable guideways inthe table 80 by means including a cam 86 2) that is fast to one'side ofthe gear 46. The periphery ofthe cam 86 is adapted to engage a cam roll88 carried by a connecting rod 90, one end of which is pivotally mountedon the adjacent trunnion of the lower feed roll, alongside of thecam 86,while the other end of the rod 90 is pivotally connected with an arm 92that is adjustably secured to a rock-shaft 94. The rock-shaft 94 ismounted to turn in suitable bearings in the side webs 82 of the table 80and carries a second arm 96, which is connected by means of a link 98,with thefeed-slide 84. A spring is coiled about the rock-shaft 94 andtends to swing the arm in a clock-wise direction, one end of the springbeing secured to one of the shaft-bearings in the adjacent web 82, whileits opposite end is secured to the arm 92. lVith this construction, thefeed-slide 84 isyieldingly actuated by the spring 100, in a direction toadvance the lifts toward the skiving mechanism, and is posi- The bottomedge of 111%11111113111 the feed-slide between a pair of guide'inembers102 (1 zine.

The cam 86 is; de

ce efthe i e'ed slide idir'lg to "prevent This si nden mu 1s a turtherprecaution "edg'eivise turningbf 1118111155 *as they arebeing 1 advanced-to the control of the feed rolls.

As the lowerrnostlift of the stack in the magazine (50 is advancedtoward the skiving 8 1, it is guided 1) that are arranged to engage-the'opp'os.

1 es of the-l ft. The guide nieinlateral e'c. bers 1'O2rcstuponthe table80 and are adjustable toward and'from each other by a right andleftscrew 10-1, the endso't'whi'ch are held in yokes 106 that aremounted for horizontal sliding adjustment on fixed guiderods 108. Asshown, the opposite ends of the guide-rods 108- are supported in ears110 projecting laterally from the table 80 and suitable tlldll'llFSClOWS112 are provided for reinovably securing the guide-rods in-place. Aknurled head 11 1 furnishes means tor turning the screiv 'lO i to varythe distance between the guide nienibers 102 so as to aceelnniodateliftsof diflier'en't Widths. Up- Wardly e Itendi11gfingers 116 (Fig. on

the guide'inembers 102, 'are 'adapted to enthe oppositedat'eraledges ofthe lifts near the'bottoinof the stack 'in the'magw zine to aline thelittsfvertically, and guide them so that, as'each lift'reaches thebettoinof the stack, it "ill be properly positioned between the guide-rne1nbers 10.2 to be engaged by the feed-slide 8 1 and advanced to theslrii 'ingmechanism.

In ordento insure the feeding of only a single lift at a time from thesupply magazine (30, at each operation of the feed-slide 8 1, a gate1-20 (Figs. 3, 5 and 6) is provided which in eilect, 'closesthe' rear ofthe mage- The gate projectsinto a vertical slet in the lower portion oftl1e'up'rightunaga zine 111e111b'er62 and is arranged to yield upwardly'to permit the lowermost lift to be fed from the magazine. To this endthe {gate is mounted for vertical sliding niovementi Ways formed betweentwo guide'ribs 122, which are secure to the rear of the nia' asine111en1ber and is forceddownwardly by a pair of spring pressed plunger-s1 which are severally confined "in rec formed within theguide-ribs 1'22.Secured o the is a ve'rtical'rod 126,- which exeuils i'lpwai'dly throughsuitable guide'ways 1ed in themagazine support 66. Anut p face of theadjacentg1-.'oe\vay, to limit "Nor-man the gate positioned g 100 tooperate id'deu y advance the t 'ed- 23 which is threaded uponthe u veerend otn r A l be red lfie'serves, by engagement with the its loweredgeextending seine *hat below the top"tace "of the lowermost it in thestack. ,1 e bott on1t.ce 'ot the gate isbevelled atrtsforward ei' i; asindicated 1% in Fig. 5 top'erinit the lOWGI'DlOSl/ll'lft stack tobetercedbencath the K 'the'latter to permit the p: i Pivotallyniountedin a ver real slot in t lowerforwaid face of the gate 'is a 1132, which extendsto the bottom face-otthe gateand is spring-pressed soas to normally "occupy the position in which it 21p; 5 in Fig. 0. Asthelitt is being a' vancedby the 1 feec l slli'de 841;, the

Wardly by the lift beiiore the? a t. gate. Vhen the gate has been raisedby the lift, the finger 15 Wvill=swing back normal position andservetoprevent the litt innnedi'atelyubevethe o e eiweged by tne tt'eed 'slidefrom being friction Y forced be neeth the bevelled faces 130 otthe gate.By turning-thenut 128 on the upper end of the rod 1%,the normalpositionoit the with 'respect tothe table 80 maybe adju in'accordancewith the thickness or the being; operatedupon, to permit the gate tooperate to bestwrdvantege. The range of upward and downward movement 01the is'liinitedby the engagenient of e stop- "lug 13 1, on the gate,with the upper or endwallsotl slot 136,111 the magazine ineniber62,-into which the stop-lug projects.

In order to overcome the tendency of the lifts to bend or'curl upwardlyas they are 1 being skived, they" are advanced beneath a Ilift-straighteningxor flattening device 140, 1 which is carried by thebearingblocksSGott-he upper feed roll. The lifts ere held flat; by1116211118 '01 the lift-straightening device 1 10, against a supportformed- "by the upper beveled face of the skiving knite'EO and theadjacent inclined support 12. A lift-straightening device of a similarnature, which is designed'to cooperate with a supportcorresponding tothe adj aeent inclined'upper facesof the skiving knife and the supportl-2, forms the subject matter of United States Patent No. 1,209,737,granted December 26', 1916, upon an application filed in the name of thepresent applicant. For

a moredetailed description of the arrange- 111e11t ofthe'liftstraightening device and the unch'ned supportmg plates and aclearer "understanding of the functions of 'these parts reference maybehad to'said patent.

Fromthe'litt straiglfiening device M0 the lifts continue 'toadvanceupwardly across *the inclined supporting plate "42' and finally 1 dropinto the frontend of a magazine or re stacked'by means of a stackingdevice 144, as Will presently be described. In practice it 'has'beenfound that there is a tendency for-theli'l'ts 'tojurnp or tip upwardlyas ='t=hey eentinueto advance=ac1 0ssthe inclined ee'ptacle 1 12, inWhich the lifts are to be so that it will continue to be advanced thereby until it is pushed over the forward edge of the support 42, astationary stabilizing finger 146 (Fig. 3) is located above said plate,and adapted to engage the top faces of the lifts as they pass beneathit, and prevent the lifts from tipping upwardly. The stabilizing finger146 is adjustably secured, by means of a set-screw 148, to a stud 150projecting rearwardly from the lift-straightening device 140. Thestabilizing finger is adjusted on the stud so as to permit the liftsto'tip and fall from the support 42 as soon as they have advanced farenough beyond the rear edge of the plate to over-balance. By looseningthe set-screw 148, the stabilizing finger may be adjusted toward or fromthe rear end of the inclined support 42, in accordance with the lengthof the lifts operated upon, so that it may not interfere with thedownward tipping of the lifts at the proper time.

The receiving magazine 142 into which the lifts drop after beingadvanced across the support 42 comprises a stationary horizontalbase-plate or floor member 154 (Fig. 3) an upwardly inclined rearend-wall 156, that is formed integrally with the base-plate 154, andopposite side-walls which are adjustable toward and from each other toprovide for lifts of different widths. The base-plate 154 is rigidlysecured at one end to a supporting bracket 157 which is, in turn,secured to the frame of the machine. At its opposite end the base-plate154 is supported by means of a post 158 which is adapted to rest uponthe floor. The arrangement of the base-plate 154 and the integralend-wall 156 is such that the latter adjoins the rear end of theinclined support 42. The side-walls of the magazine 142 each consist oftwo horizontal wall sections 160 and 162, (Figs. 1 and 2) which arearranged end-toend in alinement with each other.

The opposite side-wall sections 160 are arranged with their lower edgesresting on the base plate 154 (see 4) and in order that said wallsections may be mal'ntained'in parallelism and adjusted laterally inunison, they are severally provided with outwardly and downwardly offsetsupporting arms 164, which are carried by a right and left screw 166that is supported in bearings on the under side of the base=-plate- 154.A hand wheel 168 is secured to one end of the adjusting screw 166, bymeans of which the latter may be turned to adjust the side-wall sections160. The front extremities of the side-wall sections 160 reach to theinclined end-wall 156 and are extended upwardly at 170 to the level ofthe top of the inclined support 42 to guide the lifts into the magazineas they drop from said support.

The side-wall sections 162 are also supported with provision foradjustment toward and from each other in accordance with the width ofthe lifts which are being operated upon. To this end the wall sections162 are pivotally connected with the upper ends of separate pairs ofsupporting arms 172, (Figs. 1 and 2) said pairs of arms arranged onopposite sides of the base plate and being secured. to separaterock-shafts 174. The rock-shafts'174 extend horizontally beneath thebase plate adjacent opposite sides thereof and are adapted to turn inbearing brackets depending from the base plate. As shown, two of thesupporting arms 172 which are arranged Opposite each other on separaterock-shafts 174 are con nected by means of a coiled spring 176 whichtends to swing said arms and the wall section supported thereby towardeach other. The forward ends of the wall sec- I tions 162 overlap theouter faces of the ad tions 160, the lower portions of said guide 7plate being clove-tailed to the upper portions of said extensions 170(see Fig. 4). These guide plates 180 extend as far forward as the liftstraightening device 140 and provide for guiding the lifts after theyleave the straightening device. To provide for guiding the lifts whilepassing beneath the straightening device 140 a pair of guiding fingers.182 are severally secured to the guide plates 180 in contact with theupper face of the support 42 and extend forwardly into close proximitywith the upper feed roll. The opposed forward ends of the guidingfingers 182 are curved outwardly to facilitate the passage of the liftsbetween the fingers (see Fig. 1).

In order to provide for accurate adjustment of the guide plates 180 andthe guiding fingers 182, a pair of adjusting arms 184 are carried by a'right and left screw 186 (Figs. 1 and 3) and the forked lowersprocket-wheels and 194 onthe screws 186 and 166, respectively.

Asthe litts d1'Op fl"Oll'l the supportfl42 into the ina'azine'lt2Ttheycon1e intothe field of operations of the stacking [devicelo l-s: ;by,1neans 0t which they are to be v stackedin the magazine 142;There is some mndene rmalift as it falls into theinagazine 1 t2to tip insuch a' manner that it willnot coine to 'rest in the proper position forthe ,portormanceoit the stacking operation, i. e. with its \skiVedfalcein contact. with the inclinedend wall 156 otjthe 'lnagazine, butmay be positioned with its lower edge resting upon the floor of themagazine l at a a point somewhat. ahead of the' face of theinelinedend'wall. n1 orderto' insure that the lifts entering thein'agazine shallbe positioned as required for the stackingoperation, a lift-tippingdevice may be employed which tends to'niodi'fy somewhat the, fallingnioveinent ot the lifts. v

The lift-tipping device colnprisesla wheel 1J8, (Figs. 1 and 3) "havinga knurled or roughened periphcry which is ,conti 1n1ou sly f rotatedabout a horizontal axis and so p0: sitionod to engagea breast ,edgeof 'alitts as the lift is e-bout to drop'into the receiving,niagazine, andimpart a downward blow to the lift so as to deflect the" breast endthereoi toward the inclined end. wall. 156. To this end theli'jtttippingwheel 198 is secured on a shatt 200 which is sojournaled in a pair, ofarms 201 which embracev the wheel and curve upwardly and fo rwardly tron a swing-trame 202. The swing}. frame 202 is provided also witha pairof downwardly extending arms 203 which are arranged on" opposite sidesof the machine and are pivotally' mounted on a horizontal rot 20% whichextends transversely beneath theiniap azine and is secured to the baseplate 15; The'swing-tranie 202 is supportedin upright position by ineansof 'a thumbscrew 206, which is threaded into one of the downwardlyextending arms, and extends througlran arcuate, slot 208 (Fig.2) in anarm 210 which is secured to the na By loosening the thumb-Screw 206, theswing frame 202 n1ay be adjusted within thelimitsot the slot 208 to movethe lift-tipping,

,wh'eel toward or troni the support 42] inf accordance with the size ofthe littsbeing ed upon, in order that t may properly its tullfltion.

1.- M/L or.

drn

the pulley 218, at ,one sidevotthefbelt 212,-

a'n'd overi a pulley that is fast on the shaft,

: otthe lift-dippingfwlieel. It; will thu's' be seen thatv the-litt;tipping wheel. is, ,driyen in such a manner. that it inay'cbeadjusted to- ,d and from the support 1-2 without in terfe r n g withitsd1;."iving connections Tn "order. that the lifts may be; maintained.withuone face in 'cont-act' theinclined end wall until K operated, upon]byithe stack -f reg-asses (144-, nieans is provided to fpre venting thelifts .rt'rorn-v slipping across I the floor of thereceivi'ngmagazinefForgthisi P p a ii -@69 2? (F 3 d e I the-v es; a roughened Zapper faceis secured to the floor ot the magaZin-e adjacent the baseot 5 theendwall 15sec that it ,will engage the, lower edge of the liftzas it dropsandhpre venththe litt trorn sliding along thefloor 0t the magazine;

The staclring. device llet (Figs; '3 and 9 comprises a pair of fingers,226. are; nrovable I bodily throughgslots 223. in i the end, wall .155and adjaeentjportion of the basepl te 1540f the magazine'l 'The staclins fin s. a e er d; as hevn n E s- 3, withstraight edges 230 for-taggingthe face of the. lift-- ly ng on the in lined end wall 156. Thelingers 22 6- projeetiipwardly in parallelisnrwitheach ether fronrtlie1p per ends of fanvarrnt232to whieh they are 9 rigidly secured andsoadisposed; as to form. a

esi diee es e iens disarm; 1 AS sheen 1n Flg d, theupper endpfthear1n232is bored to receive a sleeye 234 which is secured to the armby; a .set screW-I236l, The

fingers 226 arev mounted on the. sleeve 23%: at opposite sidestoffthe.alfrii 282. over then projecting; ends of the sleeve 234g,,outs ide oftherfi'ngers226, are fittedcollars 23. 8.ff The,

collars 23 8. Ithevfing ers 22:6 and the. arm

are seci ired together by plurality of pins 240, so that, in effect,said ,ine nbe rs constitutea singleu-igi'clarnr The stacking, device 14-1 isaetaiate cl by n eansot a crank-pin 24-2 carried by a eranle; 5

e 241- lewnkif er 2-1 he week-Pie projecting through the sleeve 234- andthe it Sta-clung. dev ce being reta ned on the, cranka e en s -Q i nrlnand the head of c s-v ea ly i to the- 30 outer, end ofthe crank-p ias shown 1n; F1g

a screw 248., which :extend 4. The cranleshaft2lfv onrna-led-in bearaingsin the backet 15;? and isdriven from the. po h h 16 th u -t e seeWheel- 81 n the power statesman intermeshinggear 2? wheel 252; on thecranlcgshagtt 24th., 'Thelower end of the arm'232 of the stackingdeviceis p piyote'dat 25 41130} one end of alinki 2o6ytliec he lifttippingwheel 198 isdqiverrfrprn M :the power shaft 16 by means of apair otbraeket 15,7 With the lower end of the- 39.

other" end of which. is pivoted at? 253 tethestacking arm 232 thusmounted, the stacking fingers 226 are caused, by rotation of thecrankshaft in a clockwise direction, to move bodily through asubstantially elliptical path by reason of which the straight edges 230of the stacking fingers gradually assume a vertical position as theyadvance into the magazine. The stacking fingers consequently engage thelift which is resting against the end wall 156 and advance it toward theother lifts in the stack, at the same time tilting it into substantiallyvertical position. Furthermore, the path of movement of the stackingfingers is such as to cause them to enter the magazine 142 through theend wall portions of the slots 228 to engage the lift resting againstthe end wall, and to leave the magazine after completing a stackingoperation, by a downward movement through the rear portions of the slots228 which are in the floor ofthe magazine. In this way the generaldirection of movement of the'stacking fingers is never reversed withinthe magazine and consequently there is no possibility of the stackingfingers interfering with the lifts as they drop from the support 42, andit is impossible for a lift to be caught between the stacking fingersand the end wall 156 as might happen if the fingers oscillated back andforth within the magazine.

In order to prevent the lifts from falling away from thestack in themagazine 142 after they have been brought into stacked relationtherewith, two sets of lift-retaining pawls 262 (Figs. 1 and 3) areprovided for laterally supporting the end-most lift. These pawls 262 arepivotally mounted at their rearward ends on the side wall sections 160of the magazine and are provided near their forward ends with lugs 264which normally project through longitudinal slots into the magazine inthe path of the lifts as the latter are moved forwardly by the stackingfingers. The liftretaining pawls are yieldingly pressed inwardly bymeans of spring-pressed plungers 266 which are confined within recessesat the rear portion of the pawls and engage lugs 268 on the side wallsections 160. As the lifts are advanced in the magazine by the stackingfingers, themargins of the lifts engage bevelled faces on the lugs 264-which yield outwardly under pressure and permit the lifts to pass beyondthem. The pawls 262 are then forced'inwardly by the action of thespring-pressed plungers 266 and the lugs 264 by engagement with the rearface of the end-most lift prevent it from falling away from the otherlifts of the stack.

In order that the lifts which are acted upon by the stacking device atthe beginning of the stacking operations may be retained in verticalposition in the magazine, a pair of I in the magazine.

secured at their rear ends to the inner faces of the side wall sections160. These springs normally converge toward their rear eX- tremitiessufficiently to frictionally engage the lateral edges of the lifts whichhave been operated upon by the stacking device to hold these liftsupright until a sufficient number have accumulated in the magazine toprovide lateral support for the newly stacked lifts.

During the movement of a lift under the influence of the stackingfingers, from the position in which it is supported by the end wall 156to the upright position in which it is retained by the lift-retainingpawls 260, the lower or breast edge of the lift moves transverselyacross the roughened face of the plate 222. The plate serves during thismovement of the lift to prevent the lower edge of the lift from slippingacross the floor of the chute and thus tends to maintain the lift withinthe control of the stacking fingers, and to insure that it will betilted into a substantially vertical position thereby.

The lifts when stacked in the magazine, a

may be removed therefrom, still in their stacked relation, andconveniently introduced into the magazine of a machine which is adaptedto operate automatically upon the lifts such, for example, as anautomatic heel building machine.

\Vhile it is preferred to employ the specific construction andarrangement of parts herein shown and described it will be understoodthat this construction and arrangement is not essential, except so faras specified in the claims, and may be changed or modified withoutdeparting from the spirit and true scope of the invention.

lVhat is claimed as new, is

1. In a machine for operating upon blanks, a magazine for holding theblanks in superposed relation, a reciprocating feed member for advancingthe blanks one by one to the operating mechanism, and means forreciprocating the feed member, said means including a springfor causingthe advancing movement, and a cam and co-operating roll for causing theretreating movement, the cam being shaped to apply tension gradually tothe spring and then to permit the spring to advance the feed memberquickly.

2. A stacking device for blanks having, in combination, a magazinehaving an end wall inclined to the floor thereof and adapt ed to receivethe blanks, there being an opening located partly in said end wall andpartly in said floor, a stacking member pivoted outside the magazineupon an axis which is transverse to the longitudinal axis of themagazine, and means for moving the blank contacting portion of saidmember into and out of said opening in a substantially elliptical pathto push the blanks along removing blanks In a machine for operating uponblanks of sheet material, a magazine constructed and arranged loosely toconfine a stack of blanks, feeding mechanism for successively from oneend of the maga zinc and advancing them to the operating mechanism,guide members for engaging the blanks at their opposite lateral edges toguide them as they are advanced by the feedingmechanism, and meansindependent of the magazine for engaging the blanks as thcyapproach theend of the magazine from which they are to be removed to direct thembetween said guide members.

l. In a machine for operating upon blanks of sheet material, a table forsupporting a substantially vertical stack of blanks, a magazineconstructed and arranged to loosely confine the stack, a feed device foradvanc- "the lowermost blank in the magazine across the table to theoperating mechanism, guide members for engaging said blank at itsopposite lateral ed es to guide the blank as it is advanced by the feeddevice, and means on said guide memberstor engaging the blanks as theyapproach the lower end of the stack to direct them between the guidemembers.

5. In a machine for operating upon blanks -otit' sheet material, a tablefor supporting a substantially vertical stack of blanks, a magazinehaving side walls constructed and arranged to' confine the stack looselybetween them, a feet device for advancing the lowermost blank in themagazine across the table to the operating mechanism, adjustable guidemembers for engaging said blank at its opposite lateral. edges as it isadvanced by the feed device, fingers rising from said guide members forengaging the blanks at their opposite lateral edges as they ap coach thelower end of the magazine to directt iem between the uide members, andmeans for adjusting the guide members toward and from each other toaccommodate blanks 'ot ditferent widths.

6. in a machine for operating upon blanks sheet material, means forfeeding i re blanks to and from the operating means, a magazineconstructed and arranged to receive the blanks after they have beenoperated upon,- said magazine having an inclined end wall adaptedtemporarily to support; the blanks by engagement with a are thereof; andmeans for operating upon .he blanks thus supported to stack them inupright position in the magazine.

7. .ln machine for operating upon blanks oi sheetmaterial, a supportacross which the blanks are fed successively from the op cratingmechanism, a magazine arranged to receii e the blanks atterthey havebeen fed across said support, the magazine having an inclined end walladapted temporarily to support the blanks by engagement with a facethereof, and Ca stackin'ggmember movable throughsaid end wall forengaging the blank supported thereby and bringing it into uprightposition in stacked relation with he blankspreviously delivered to'themag a'zine.

8. In a machine for-o aeratin n 3011 blanks preventing the. blanks fromslipping across the "floor of lillQ'IlltlgiLZlllt-B while restingagainst said end wall. 7 p

9. In a machine for operating upon blanks of sheet material,mechanismior advancing the blanks successively -from the operatingmechanism, a inagazine fonreceiving the blanks after they have beenoperated upon, the magazine having an upwardly'inclined end wall to rsupporting each blankin an inclined position as it is received in themagazine and a floor providedwith a roughened portion for engaging thelowermost edges oithe blanks to prevent the blanks iromslipping acrossthe floor, and means for operating upon the blanks thus supported tostack them in the magazine. H y

10'. In a machine for operating upon blanks of sheet material, mechanismfor advancing the blanks successively from the operating means, amagazinehaving a substantially horizontal floor and anupwardly inclinedend wall constructed and arnnged to receive the blanks after they havebeen operated upon and to support them temporarily in aninclinedposition, and an oscillating'stackingfinger movable through saidend wall to bring the blanks int-o stacked relation with thosepreviously received in the magazine.

11. In a machine. for operating upon blanks of sheet material, mechanismfor advancing the blanks successively from "the operating means, amagazine having a sub-- stantially horizontal floor and an upwardlyinclined end wall constructed and arranged to receive the blanks afterthey have been operated upon and to support them temporarily in aninclined position, said magazine also having an opening extendingthrough the end wall and the floor, a stacking member adaptedperiodically to swing through the vmagazine to bring the blank supportedby the end wall into stacked relation with those previously received inthe magazine the'stacking member entering the magazine through the endwall portion of said opening and leaving the magazine through the floorportion of said opening, and means for actuating the stacking member.

12. In a machine for operating upon blanks of sheet material, mechanismfor advancing the blanks successively from the operating means, amagazine for receiving the blanks after they have been operated upon,the magazine having a substantially horizontal floor andan inclined endwall for supporting the blanks in an inclined position as they arereceived in the magazine, means operating intermittently upon i theblanks thus supported to position them vertically in the magazine, andmeans for preventing the blanks thus vertically positioned from tippingin either direction.

13. In a machine for operating upon blanks of sheet material, mechanismfor advancing the blanks successively from the operating means, a.magazine for receiving the blanks after they have been operated upon,the magazine having a. substantially horizontal floor and an inclinedend wall for supporting the blanks in an inclined position as they arereceived in the magazine, stacking means operating intermittently uponthe blanks thus supported to position them vertically'in stackedrelation in the magazine, and means for frictionally engaging the blanksafter they have been operated upon by said stacking means to retain themin stacked relation.

14. In a machine for operating upon blanks of sheet material, mechanismfor advancing the blanks successively from the operating means, amagazine for receiving the blanks after they have been operated upon,the magazine being constructed and arranged to temporarily support eachblank in an inclined position as it is received there in, stacking meansoperating upon the blanks thus supported to position them vertically inthe magazine, and a pairof thin spring plates arranged toengage theopposite lateral edges of the blanks as they are brought into verticalposition by the stacking means to retain the blanks in stacked relation.

15. In a machine for operating upon blanks of sheet material, mechanismfor advancing the blanks successively from the operating means, asupport across which the blanks'are pushed by the advance of the blanksfrom the operating means, a magazine below said support into which theblanks drop after being pushed across said support, and a finger forholding the blanks downwardly against said support to maintain them inthe plane of the blanks coming from the operating means, said fingerbeing adjustable toward and from the end of the support in accordancewith the size of the blanks being operated upon to avoidinterferencewith the tipping of the blanks as they fall from saidsupport.

16. In a machine for operating upon blanks of sheet material, a magazinefor receiving the blanks after they have been operated upon, means forstacking the blanks in the magazine, a support extending between theoperating means and the stack ing means over which the blanks are pushedin series to the stacking means by the advance of blanks from theoperating means, a device for preventing the blanks from curling whilethey are being operated upon, and means for holding the blanksdownwardly against said support as they reach the delivery end thereofto maintain them in the plane of the following blanks.

17. In a machine for operating upon blanks of sheet material, a magazinefor receiving the blanks after they have been operated upon, means forstacking the blanks in the magazine, a support-between the operatingmeans and the magazine across which the blanks are pushed to thestacking means by the advance of blanks from the operating means, astraightening device cooperating with that end of said support adjacentthe operating means, and a stabilizing finger adjustable toward and fromthe straightening device for maintaining a leading blank in the plane ofa following blank.

18. In a machine, for operating upon blanks ofv sheet material, asupport adjacent the operating means, mechanism for advancing the blankssuccessively from the operating means across said support until theyfall from the end thereof, a magazine to receive the falling blanks, astacking device for engaging each blank as itis received in the magazineand bringing it into stacked relation with the other blanks therein, andmeans for modifying the falling movements of the blanks properly toposition them within the field of operations of the stacking device. g

19. In a machine for operating upon blanks of sheet material, a supportadjacent the operating means, mechanism for advancing the blankssuccessively from the operat ing means across said support until theyfall from the end thereof, a magazine in which the blanks are to bestacked, the magazine being constructed and arranged to receive thefalling blanks, and temporarily support them in a predetermined positionpreparatory to the stacking operation, a stacking device for engagingeach blank as it is received in the magazine and bringing it intostacked relation with the other blanks therein, means for actuating thestacking device, and a rotating wheel constructed and arranged to strikethe blanks a downward blow as they are about to drop into the magazme soas to cause them to assume the required position as they come to resttherein.

an upwardly directed mouth, a support for an upwardly directed mouth, asupport for p the blanks across which each blank is pushed the blanksacross which each blank is pushed 10 until its forward portion overhangsthe until its forward portion overhangs the mouth, and means forengaging the forward mouth, and a rotary member for engaging 5 end ofthe blank and tipping it down into the forward end of the blank andtipping it the mouth of the magazine. down into the mouth of themagazine.

21. In a machine for operating upon blanks of sheet material, a magazinehaving THOMAS LUND.

